Damper.



C. M. JENSEN.

DAMPER.

APPLICATION FILED FEB. 11. I915.

1,163,929. Patented Dec. 14, 1915.

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C. M. IENSEN.

DAMPER.

APPLICATION FILED FEB. n. 1915.

1,163,929. Patented Dec. 14, 1915.

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CARL IM. JENSEN, OF LEWISTOWN, MONTANA, ASSIGNOB. 0F ONE-HALF T0 SAFE'UEL C. DITTY, OF LEVJ'ISTOWN, Iift'ONTANA.

DAMPER.

Specification of Letters Patent.

Patented Dec. 14, 1915.

Application filed. February 11, 1815. Serial No. 7,611.

To all whom it may concern:

Be it known that I, CARL M. JENsEN, a citizen of the United States, residing at Lewistown, in the county of Fergus and State of Montana, have invented certain new and useful Improvements in Dampers; and 1 do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

My invention relates broadly to improvements in dampers and more particularly to those adapted for use in chimneys or lines.

The object of the invention is to provide a device of this character formed of a plurality of pivotally supported plates adapted to overlap each other at their edges to check the upward draft within the chimney, and to provide stops whereby the edges of said plates are prevented from moving into an tight contact.

With the above object in view, the inven* tion resides in certain novel features of construction and combination hereinafter more fully described and claimed and shown in the drawings wherein Figure 1 is a vertical transverse section through a fire place anda portion of the flue leading upwardly therefrom; Fig. 2 is a vertical section as seen along the plane of the line 22 of Fig. 1, the damper plates being shown in inactive positicn; Fig. 8 is a view similar to Fig. 2 but illustrating said plates in active position; Fig. 4 is a horizontal section as seen along the plane indicated by the line l l of Fig. 1; and Fig. 5 is a perspective view of one of the damper plates.

In these drawings, constituting a part of the application, a fire place P is shown as having its rear side formed by an upwardly and forwardly curving wall V, the latter proiectino' a sl ht distance into the enlarged lower end E of a fire F, said enlarged end and the remaind of the flue being here shown as connected by a contracted throat T.

Disposed in the space between the front wall of the enlarged end E of the flue, and the projecting upper end of the rear wall W of the fire place P, is a rectangular supporting frame 1, this frame comprising a pair of parallel horizontally dispcsed side bars 2 which are constructed of angle iron, the horizontal flanges of which project outwardly, and a pair of transverse angle iron end bars 3 which connect the opposite ends of the side bars 2 and whose horizontal flanges likewise project outwardly. In applying the frame to use, the horizontal flanges of the end bars 3 are embedded in the side walls of the lower end E of the flue F, as disclosed at a in Fig. 2, the horizontal flange of the front side bar is embedded in the front wall of said lower end as indicated at 5 in Fig. l, and as seen at 6 in Fig. l, the horizontal flange of the rear side bar is partially embedded in the projecting upper end of the rear wall W of the fire place P. By so positioning this frame, the chimney construction is effectively reinforced and the frame is rigidly secured in position.

Disposed transversely between the two longitudinally extending side bars 1, is a plurality of parallel damper plates 10, these plates being of rectangular construction as most clearly seen in Figs. 1 and 5. The lower corners of the plates 10 are provided with integral pivot studs 11 which project horizontally therefrom through openings 12 in the upright flanges of the side bars 1, whereby the various damper plates are pivotally supported to swing upwardly to the position seen in Fig. 2, or downwardly to that seen in Fig. 3, such swinging of all of the plates being effected simultaneously by the provision of a longitudinally extending spacing rod 20 which passes through perforated ears 21 formed on the upper edges of the various plates 10, said rod being prevented from shifting within the openings of said ears by extending a plural ty of transverse pins 20 through the rod on opposite sides of the ears, this construction being mostclearly d sclosed in Fig. 4e.

\Vith the parts constructed and arranged as above described. the numerous plates 10 are adapted to fold downwardlv to check the upward draft through the chimney, but it becomes expedient to provide means whereby such plates are prevented from moving into air tight contact. For this purpose, each of the plates 10 is provided with anintegral laterally projecting stop finger at one'of its upper corners, these fingers being preferably offset from the plane of the plates as shown, whereby when the plates are folded downwardly as seen in Fig. 3, the stop fingers 25 will abut the upper edge of one of the side bars 1, thus correctly spacing the edges of the various plates, in order to allow the necessary draft and smoke to pass upwardly therethrough. Particular emphasis is laid upon the fact that the plates 10, the pivot studs 11 thereon, the stop fingers 25, and the perforated ears 21 are all struck from single sheets of metal, this being very simple yet efiicient construction.

In connection with the parts so far described, I intend to provide means whereby the position of the various damper plates 10 may be varied from the exterior of the chimney, and, as typical of one form of such means, I have shown a chain 30 connected at its inner end to the rod 20, the outer end of said chain being equipped with a weight 31, while its intermediate portion passes through an opening in one wall of the chimney and is trained over a pulley or other appropriate guide 33. By the provision of this chain and weight, the latter will counter-balance the weight of the various plates 10 and will retain them in the positions to which they are adjusted.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that although a very simply constructed damper has been provided for carrying out the object of the invention, such damper will be very eflicient in operation and may not be closed to such an extent as to entirely prevent upward draft through the chimney, it being therefore practically impossible for smoke to be expelled from the front of the fire place P.

I claim 1. A damper comprising an open horizontal rectangular frame having a series of plates and having their free ends oliset laterally and positioned for engagement with the upper edge of one slde bar of the .frame, whereby to prevent the edge portions of said plates from coming into air tight contact, an operating rod passing through the alined openings in said plates, and a plurality of pins extending transversely through said rod on opposite sides of said ears to prevent said rod from shifting within said openings.

2. The combination with a damper comprising a plurality of pivotally mounted damper plates adapted to move in unison, of ears projecting from one edge of said plates and having openings elongated transversely of said plates, a single operating rod passed through all of the openings, and stop pins passed through said rod on opposite sides of the ears.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

CARL M. JENSEN. -Witnesses:

BURTON R. Conn, G. I. RANKIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

